<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
</head>

<body>
    <div id="app"></div>
    <script type="text/babel">
        class App extends React.Component{
            state = {
                hot: true
            }

            render() {
                const {hot} = this.state
                if(hot){
                    return (
                        <div>
                            <button onClick={this.changeWeather}>点我点我</button>
                            <p>热得雪糕都化不了</p>
                        </div>
                    )
                }else{
                    return (
                        <div>
                            <button onClick={this.changeWeather}>点我点我</button>
                            <p>冷的头发都飘起来了</p>
                        </div>
                    )
                }
            }

            changeWeather = ()=>{
                const {hot} = this.state
                this.setState({
                    hot: !hot
                })
            }
        }

        const root = ReactDOM.createRoot(document.getElementById("app"))
        root.render(<App />)


    </script>
</body>

</html>